How to make image background white?

18 views (last 30 days)
Zara Khan
Zara Khan on 24 Dec 2019
Commented: Zara Khan on 28 Dec 2019
I have a binary image. I want to make the background white keeping the black straight lines intact.I mean those lines which intersecting image objects will remain intact. Picture has attached.

Accepted Answer

Jeff E
Jeff E on 24 Dec 2019
I would start by closing in small gaps to get a solid hand.
imgin_close = imclose(imgin, strel('square', 3));
Then I would find the overlap between that solid hand, and the inverse of the original image, leaving me with just white lines on a black background. You may have some additional noise around the edges of the hand. The could be filtered out with something like bwareaopen, depending on your application.
imgin_lines = imgin_close & ~imgin;
imgin_lines = bwareaopen(imgin_lines, 3);
I would then take the inverse of that image to get just the black lines.
imgout = ~imgin_lines;
  5 Comments
Zara Khan
Zara Khan on 28 Dec 2019
Image Analyst: Wonderful. Exactly this is what I was asking for.

Sign in to comment.

More Answers (0)

Categories

Find more on Modify Image Colors in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!